WADM009: User userid belongs to unregistered group name.

According to the SYSXDB.SYSACFMEMBERS table in the SYSTEM location, user userid belongs to group name. However, group name is missing from the SYSXDB.SYSACFGROUPS table. Any group in SYSASCMEMBERS must also be in SYSACFGROUPS. You may remedy this situation by inserting group name into SYSACFGROUPS by selecting the Insert Group option under the Groups menu in XADMIN. Or you can delete group name from SYSACFMEMBERS by running the following interactive SQL command:
Restriction: This topic applies to Windows environments only.

DELETE FROM SYSTEM.SYSXDB.SYSACFMEMBERS WHERE GROUPAUTHID = userid;